Abstract

Overview

EN ISO 8502-3:2017 (ISO 8502-3:2017) specifies a simple, qualitative method for the assessment of dust on steel surfaces prepared for painting using a pressure-sensitive tape. The procedure produces pictorial ratings for the average quantity of dust and descriptive classes for the average particle size, enabling use as a pass/fail inspection or to create a permanent record of surface dust contamination prior to coating application.

Key topics and requirements

Method principle: press a pressure-sensitive adhesive tape onto the steel surface, remove it, mount the tape on a contrasting display board and visually assess the deposited dust.
Assessment outputs:
- Pictorial ratings for average dust quantity (qualitative scale).
- Descriptive classes for average dust particle size.
Scope and applicability:
- Intended for dust remaining on cleaned steel substrates prepared for painting.
- The document states the method is useful for steel surfaces corresponding to rust grades A, B or C (per ISO 8501‑1).
Materials and references:
- Uses pressure-sensitive tapes conforming to relevant test methods (see IEC 60454-2).
- Terminology aligned with ISO 4618.
Documentation: test reports should record location, date/time, number of tests, pictorial rating/class and any reference specimens used. Annex A provides guidance on a spring-loaded roller for tape application.

Practical applications

Quality control and inspection on blasting, fabrication and construction sites to check residual dust prior to painting.
Coating acceptance testing for contractors, inspectors and owners (shipbuilding, offshore structures, bridges, pipelines, industrial steelwork).
Comparative evaluations of cleaning methods or environmental contamination by using standard specimens to benchmark results.
Useful where dust can affect coating adhesion or trap moisture and salts that promote corrosion.

Who uses this standard

Coating inspectors and QA/QC teams
Surface preparation engineers and specifiers
Paint manufacturers and applicators
Asset owners and project managers responsible for protective coatings

Related standards

ISO 8501‑1 - rust grades and preparation grades (visual reference)
ISO 4618 - paints and varnishes terms and definitions
IEC 60454‑2 - pressure-sensitive adhesive tape test methods
Other parts of ISO 8502 (chloride, salt and contamination tests) and ISO 8503/8504 series on surface roughness and preparation

Keywords: ISO 8502-3, EN ISO 8502-3:2017, pressure-sensitive tape method, dust assessment, surface cleanliness, steel substrate preparation, blast-cleaned steel, coating inspection, quality control.

SIST EN ISO 8502-3:2017 PDF

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Abstract

Overview

Key topics and requirements

Practical applications

Who uses this standard

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Технические детали

ISO 8502-3:2017

Preparation of steel substrates before application of paints and related products — Tests for the assessment…

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